Theorem frgpcpbl 18172

Description: Compatibility of the group operation with the free group equivalence relation. (Contributed by Mario Carneiro, 1-Oct-2015.) (Revised by Mario Carneiro, 27-Feb-2016.)

Hypotheses

Ref	Expression
frgpval.m	⊢ 𝐺 = (freeGrp‘𝐼)
frgpval.b	⊢ 𝑀 = (freeMnd‘(𝐼 × 2𝑜))
frgpval.r	⊢ ∼ = ( ~FG ‘𝐼)
frgpcpbl.p	⊢ + = (+g‘𝑀)

Assertion

Ref	Expression
frgpcpbl	⊢ ((𝐴 ∼ 𝐶 ∧ 𝐵 ∼ 𝐷) → (𝐴 + 𝐵) ∼ (𝐶 + 𝐷))

Proof of Theorem frgpcpbl

Dummy variables 𝑘 𝑚 𝑛 𝑡 𝑣 𝑤 𝑥 𝑦 𝑧 are mutually distinct and distinct from all other variables.

Step	Hyp	Ref	Expression
1		eqid 2622	. . 3 ⊢ ( I ‘Word (𝐼 × 2𝑜)) = ( I ‘Word (𝐼 × 2𝑜))
2		frgpval.r	. . 3 ⊢ ∼ = ( ~FG ‘𝐼)
3		eqid 2622	. . 3 ⊢ (𝑦 ∈ 𝐼, 𝑧 ∈ 2𝑜 ↦ ⟨𝑦, (1𝑜 ∖ 𝑧)⟩) = (𝑦 ∈ 𝐼, 𝑧 ∈ 2𝑜 ↦ ⟨𝑦, (1𝑜 ∖ 𝑧)⟩)
4		eqid 2622	. . 3 ⊢ (𝑣 ∈ ( I ‘Word (𝐼 × 2𝑜)) ↦ (𝑛 ∈ (0...(#‘𝑣)), 𝑤 ∈ (𝐼 × 2𝑜) ↦ (𝑣 splice ⟨𝑛, 𝑛, ⟨“𝑤((𝑦 ∈ 𝐼, 𝑧 ∈ 2𝑜 ↦ ⟨𝑦, (1𝑜 ∖ 𝑧)⟩)‘𝑤)”⟩⟩))) = (𝑣 ∈ ( I ‘Word (𝐼 × 2𝑜)) ↦ (𝑛 ∈ (0...(#‘𝑣)), 𝑤 ∈ (𝐼 × 2𝑜) ↦ (𝑣 splice ⟨𝑛, 𝑛, ⟨“𝑤((𝑦 ∈ 𝐼, 𝑧 ∈ 2𝑜 ↦ ⟨𝑦, (1𝑜 ∖ 𝑧)⟩)‘𝑤)”⟩⟩)))
5		eqid 2622	. . 3 ⊢ (( I ‘Word (𝐼 × 2𝑜)) ∖ ∪ 𝑥 ∈ ( I ‘Word (𝐼 × 2𝑜))ran ((𝑣 ∈ ( I ‘Word (𝐼 × 2𝑜)) ↦ (𝑛 ∈ (0...(#‘𝑣)), 𝑤 ∈ (𝐼 × 2𝑜) ↦ (𝑣 splice ⟨𝑛, 𝑛, ⟨“𝑤((𝑦 ∈ 𝐼, 𝑧 ∈ 2𝑜 ↦ ⟨𝑦, (1𝑜 ∖ 𝑧)⟩)‘𝑤)”⟩⟩)))‘𝑥)) = (( I ‘Word (𝐼 × 2𝑜)) ∖ ∪ 𝑥 ∈ ( I ‘Word (𝐼 × 2𝑜))ran ((𝑣 ∈ ( I ‘Word (𝐼 × 2𝑜)) ↦ (𝑛 ∈ (0...(#‘𝑣)), 𝑤 ∈ (𝐼 × 2𝑜) ↦ (𝑣 splice ⟨𝑛, 𝑛, ⟨“𝑤((𝑦 ∈ 𝐼, 𝑧 ∈ 2𝑜 ↦ ⟨𝑦, (1𝑜 ∖ 𝑧)⟩)‘𝑤)”⟩⟩)))‘𝑥))
6		eqid 2622	. . 3 ⊢ (𝑚 ∈ {𝑡 ∈ (Word ( I ‘Word (𝐼 × 2𝑜)) ∖ {∅}) ∣ ((𝑡‘0) ∈ (( I ‘Word (𝐼 × 2𝑜)) ∖ ∪ 𝑥 ∈ ( I ‘Word (𝐼 × 2𝑜))ran ((𝑣 ∈ ( I ‘Word (𝐼 × 2𝑜)) ↦ (𝑛 ∈ (0...(#‘𝑣)), 𝑤 ∈ (𝐼 × 2𝑜) ↦ (𝑣 splice ⟨𝑛, 𝑛, ⟨“𝑤((𝑦 ∈ 𝐼, 𝑧 ∈ 2𝑜 ↦ ⟨𝑦, (1𝑜 ∖ 𝑧)⟩)‘𝑤)”⟩⟩)))‘𝑥)) ∧ ∀𝑘 ∈ (1..^(#‘𝑡))(𝑡‘𝑘) ∈ ran ((𝑣 ∈ ( I ‘Word (𝐼 × 2𝑜)) ↦ (𝑛 ∈ (0...(#‘𝑣)), 𝑤 ∈ (𝐼 × 2𝑜) ↦ (𝑣 splice ⟨𝑛, 𝑛, ⟨“𝑤((𝑦 ∈ 𝐼, 𝑧 ∈ 2𝑜 ↦ ⟨𝑦, (1𝑜 ∖ 𝑧)⟩)‘𝑤)”⟩⟩)))‘(𝑡‘(𝑘 − 1))))} ↦ (𝑚‘((#‘𝑚) − 1))) = (𝑚 ∈ {𝑡 ∈ (Word ( I ‘Word (𝐼 × 2𝑜)) ∖ {∅}) ∣ ((𝑡‘0) ∈ (( I ‘Word (𝐼 × 2𝑜)) ∖ ∪ 𝑥 ∈ ( I ‘Word (𝐼 × 2𝑜))ran ((𝑣 ∈ ( I ‘Word (𝐼 × 2𝑜)) ↦ (𝑛 ∈ (0...(#‘𝑣)), 𝑤 ∈ (𝐼 × 2𝑜) ↦ (𝑣 splice ⟨𝑛, 𝑛, ⟨“𝑤((𝑦 ∈ 𝐼, 𝑧 ∈ 2𝑜 ↦ ⟨𝑦, (1𝑜 ∖ 𝑧)⟩)‘𝑤)”⟩⟩)))‘𝑥)) ∧ ∀𝑘 ∈ (1..^(#‘𝑡))(𝑡‘𝑘) ∈ ran ((𝑣 ∈ ( I ‘Word (𝐼 × 2𝑜)) ↦ (𝑛 ∈ (0...(#‘𝑣)), 𝑤 ∈ (𝐼 × 2𝑜) ↦ (𝑣 splice ⟨𝑛, 𝑛, ⟨“𝑤((𝑦 ∈ 𝐼, 𝑧 ∈ 2𝑜 ↦ ⟨𝑦, (1𝑜 ∖ 𝑧)⟩)‘𝑤)”⟩⟩)))‘(𝑡‘(𝑘 − 1))))} ↦ (𝑚‘((#‘𝑚) − 1)))
7	1, 2, 3, 4, 5, 6	efgcpbl2 18170	. 2 ⊢ ((𝐴 ∼ 𝐶 ∧ 𝐵 ∼ 𝐷) → (𝐴 ++ 𝐵) ∼ (𝐶 ++ 𝐷))
8	1, 2	efger 18131	. . . . . 6 ⊢ ∼ Er ( I ‘Word (𝐼 × 2𝑜))
9	8	a1i 11	. . . . 5 ⊢ ((𝐴 ∼ 𝐶 ∧ 𝐵 ∼ 𝐷) → ∼ Er ( I ‘Word (𝐼 × 2𝑜)))
10		simpl 473	. . . . 5 ⊢ ((𝐴 ∼ 𝐶 ∧ 𝐵 ∼ 𝐷) → 𝐴 ∼ 𝐶)
11	9, 10	ercl 7753	. . . 4 ⊢ ((𝐴 ∼ 𝐶 ∧ 𝐵 ∼ 𝐷) → 𝐴 ∈ ( I ‘Word (𝐼 × 2𝑜)))
12	1	efgrcl 18128	. . . . . . 7 ⊢ (𝐴 ∈ ( I ‘Word (𝐼 × 2𝑜)) → (𝐼 ∈ V ∧ ( I ‘Word (𝐼 × 2𝑜)) = Word (𝐼 × 2𝑜)))
13	11, 12	syl 17	. . . . . 6 ⊢ ((𝐴 ∼ 𝐶 ∧ 𝐵 ∼ 𝐷) → (𝐼 ∈ V ∧ ( I ‘Word (𝐼 × 2𝑜)) = Word (𝐼 × 2𝑜)))
14	13	simprd 479	. . . . 5 ⊢ ((𝐴 ∼ 𝐶 ∧ 𝐵 ∼ 𝐷) → ( I ‘Word (𝐼 × 2𝑜)) = Word (𝐼 × 2𝑜))
15	13	simpld 475	. . . . . . 7 ⊢ ((𝐴 ∼ 𝐶 ∧ 𝐵 ∼ 𝐷) → 𝐼 ∈ V)
16		2on 7568	. . . . . . 7 ⊢ 2𝑜 ∈ On
17		xpexg 6960	. . . . . . 7 ⊢ ((𝐼 ∈ V ∧ 2𝑜 ∈ On) → (𝐼 × 2𝑜) ∈ V)
18	15, 16, 17	sylancl 694	. . . . . 6 ⊢ ((𝐴 ∼ 𝐶 ∧ 𝐵 ∼ 𝐷) → (𝐼 × 2𝑜) ∈ V)
19		frgpval.b	. . . . . . 7 ⊢ 𝑀 = (freeMnd‘(𝐼 × 2𝑜))
20		eqid 2622	. . . . . . 7 ⊢ (Base‘𝑀) = (Base‘𝑀)
21	19, 20	frmdbas 17389	. . . . . 6 ⊢ ((𝐼 × 2𝑜) ∈ V → (Base‘𝑀) = Word (𝐼 × 2𝑜))
22	18, 21	syl 17	. . . . 5 ⊢ ((𝐴 ∼ 𝐶 ∧ 𝐵 ∼ 𝐷) → (Base‘𝑀) = Word (𝐼 × 2𝑜))
23	14, 22	eqtr4d 2659	. . . 4 ⊢ ((𝐴 ∼ 𝐶 ∧ 𝐵 ∼ 𝐷) → ( I ‘Word (𝐼 × 2𝑜)) = (Base‘𝑀))
24	11, 23	eleqtrd 2703	. . 3 ⊢ ((𝐴 ∼ 𝐶 ∧ 𝐵 ∼ 𝐷) → 𝐴 ∈ (Base‘𝑀))
25		simpr 477	. . . . 5 ⊢ ((𝐴 ∼ 𝐶 ∧ 𝐵 ∼ 𝐷) → 𝐵 ∼ 𝐷)
26	9, 25	ercl 7753	. . . 4 ⊢ ((𝐴 ∼ 𝐶 ∧ 𝐵 ∼ 𝐷) → 𝐵 ∈ ( I ‘Word (𝐼 × 2𝑜)))
27	26, 23	eleqtrd 2703	. . 3 ⊢ ((𝐴 ∼ 𝐶 ∧ 𝐵 ∼ 𝐷) → 𝐵 ∈ (Base‘𝑀))
28		frgpcpbl.p	. . . 4 ⊢ + = (+g‘𝑀)
29	19, 20, 28	frmdadd 17392	. . 3 ⊢ ((𝐴 ∈ (Base‘𝑀) ∧ 𝐵 ∈ (Base‘𝑀)) → (𝐴 + 𝐵) = (𝐴 ++ 𝐵))
30	24, 27, 29	syl2anc 693	. 2 ⊢ ((𝐴 ∼ 𝐶 ∧ 𝐵 ∼ 𝐷) → (𝐴 + 𝐵) = (𝐴 ++ 𝐵))
31	9, 10	ercl2 7755	. . . 4 ⊢ ((𝐴 ∼ 𝐶 ∧ 𝐵 ∼ 𝐷) → 𝐶 ∈ ( I ‘Word (𝐼 × 2𝑜)))
32	31, 23	eleqtrd 2703	. . 3 ⊢ ((𝐴 ∼ 𝐶 ∧ 𝐵 ∼ 𝐷) → 𝐶 ∈ (Base‘𝑀))
33	9, 25	ercl2 7755	. . . 4 ⊢ ((𝐴 ∼ 𝐶 ∧ 𝐵 ∼ 𝐷) → 𝐷 ∈ ( I ‘Word (𝐼 × 2𝑜)))
34	33, 23	eleqtrd 2703	. . 3 ⊢ ((𝐴 ∼ 𝐶 ∧ 𝐵 ∼ 𝐷) → 𝐷 ∈ (Base‘𝑀))
35	19, 20, 28	frmdadd 17392	. . 3 ⊢ ((𝐶 ∈ (Base‘𝑀) ∧ 𝐷 ∈ (Base‘𝑀)) → (𝐶 + 𝐷) = (𝐶 ++ 𝐷))
36	32, 34, 35	syl2anc 693	. 2 ⊢ ((𝐴 ∼ 𝐶 ∧ 𝐵 ∼ 𝐷) → (𝐶 + 𝐷) = (𝐶 ++ 𝐷))
37	7, 30, 36	3brtr4d 4685	1 ⊢ ((𝐴 ∼ 𝐶 ∧ 𝐵 ∼ 𝐷) → (𝐴 + 𝐵) ∼ (𝐶 + 𝐷))

Syntax hints:   → wi 4   ∧ wa 384   = wceq 1483   ∈ wcel 1990  ∀wral 2912  {crab 2916  Vcvv 3200   ∖ cdif 3571  ∅c0 3915  {csn 4177  ⟨cop 4183  ⟨cotp 4185  ∪ ciun 4520   class class class wbr 4653   ↦ cmpt 4729   I cid 5023   × cxp 5112  ran crn 5115  Oncon0 5723  ‘cfv 5888  (class class class)co 6650   ↦ cmpt2 6652  1_𝑜c1o 7553  2_𝑜c2o 7554   Er wer 7739  0cc0 9936  1c1 9937   − cmin 10266  ...cfz 12326  ..^cfzo 12465  #chash 13117  Word cword 13291   ++ cconcat 13293   splice csplice 13296  ⟨“cs2 13586  Basecbs 15857  +_gcplusg 15941  freeMndcfrmd 17384   ~_FG cefg 18119  freeGrpcfrgp 18120

This theorem was proved from axioms:  ax-mp 5  ax-1 6  ax-2 7  ax-3 8  ax-gen 1722  ax-4 1737  ax-5 1839  ax-6 1888  ax-7 1935  ax-8 1992  ax-9 1999  ax-10 2019  ax-11 2034  ax-12 2047  ax-13 2246  ax-ext 2602  ax-rep 4771  ax-sep 4781  ax-nul 4789  ax-pow 4843  ax-pr 4906  ax-un 6949  ax-cnex 9992  ax-resscn 9993  ax-1cn 9994  ax-icn 9995  ax-addcl 9996  ax-addrcl 9997  ax-mulcl 9998  ax-mulrcl 9999  ax-mulcom 10000  ax-addass 10001  ax-mulass 10002  ax-distr 10003  ax-i2m1 10004  ax-1ne0 10005  ax-1rid 10006  ax-rnegex 10007  ax-rrecex 10008  ax-cnre 10009  ax-pre-lttri 10010  ax-pre-lttrn 10011  ax-pre-ltadd 10012  ax-pre-mulgt0 10013

This theorem depends on definitions:  df-bi 197  df-or 385  df-an 386  df-3or 1038  df-3an 1039  df-tru 1486  df-ex 1705  df-nf 1710  df-sb 1881  df-eu 2474  df-mo 2475  df-clab 2609  df-cleq 2615  df-clel 2618  df-nfc 2753  df-ne 2795  df-nel 2898  df-ral 2917  df-rex 2918  df-reu 2919  df-rab 2921  df-v 3202  df-sbc 3436  df-csb 3534  df-dif 3577  df-un 3579  df-in 3581  df-ss 3588  df-pss 3590  df-nul 3916  df-if 4087  df-pw 4160  df-sn 4178  df-pr 4180  df-tp 4182  df-op 4184  df-ot 4186  df-uni 4437  df-int 4476  df-iun 4522  df-iin 4523  df-br 4654  df-opab 4713  df-mpt 4730  df-tr 4753  df-id 5024  df-eprel 5029  df-po 5035  df-so 5036  df-fr 5073  df-we 5075  df-xp 5120  df-rel 5121  df-cnv 5122  df-co 5123  df-dm 5124  df-rn 5125  df-res 5126  df-ima 5127  df-pred 5680  df-ord 5726  df-on 5727  df-lim 5728  df-suc 5729  df-iota 5851  df-fun 5890  df-fn 5891  df-f 5892  df-f1 5893  df-fo 5894  df-f1o 5895  df-fv 5896  df-riota 6611  df-ov 6653  df-oprab 6654  df-mpt2 6655  df-om 7066  df-1st 7168  df-2nd 7169  df-wrecs 7407  df-recs 7468  df-rdg 7506  df-1o 7560  df-2o 7561  df-oadd 7564  df-er 7742  df-ec 7744  df-map 7859  df-pm 7860  df-en 7956  df-dom 7957  df-sdom 7958  df-fin 7959  df-card 8765  df-pnf 10076  df-mnf 10077  df-xr 10078  df-ltxr 10079  df-le 10080  df-sub 10268  df-neg 10269  df-nn 11021  df-2 11079  df-n0 11293  df-z 11378  df-uz 11688  df-fz 12327  df-fzo 12466  df-hash 13118  df-word 13299  df-concat 13301  df-s1 13302  df-substr 13303  df-splice 13304  df-s2 13593  df-struct 15859  df-ndx 15860  df-slot 15861  df-base 15863  df-plusg 15954  df-frmd 17386  df-efg 18122

This theorem is referenced by:  frgp0  18173  frgpadd  18176